Scale and ratios
On a drawing at 1 : 50 everything is 50 times smaller than in reality. Calculate both ways — and use the same thinking for prices and recipes.
Your numbers
Answer
In reality
4m
How to work it out
- 18 cm · 50 = 400 cm
- 2400 cm = 4 m
The formula
1 : n
1 cm on the drawing is n cm in reality. 1 : 50 means everything is drawn 50 times smaller.
virkelighed = tegning · n · tegning = virkelighed / n
Remember to work in the same unit before you multiply or divide.
a → b ⇒ c → b/a · c
Rule of three: first find what 1 gives, then multiply up.
More: Equations and functions
- EquationsSolve linear and quadratic equations step by step.
- Linear functiony = ax + b as a graph and table — or find the line through two points.
- Two equations with two unknownsSolve a system of equations step by step and see the intersection on the graph.
- Growth and decayPercentage growth against linear growth — table, graph and doubling time.